Influence of the welding thermal cycle on the hardness of a dissimilar tantalum joint

Authors

  • María de Lourdes Pérez-Lamorú Universidad de Moa, Moa, Cuba
  • Taymí Ardebol-Matos Universidad de Moa, Moa, Cuba
  • Marbelis Lamorú-Urgellés Universidad de Moa, Moa, Cuba
  • Yanay Columbié-Fermin Universidad de Moa, Moa, Cuba
  • Maikel Gómez-Fernández Universidad de Ciencias Médicas, Sancti Spíritus, Cuba

Keywords:

welding GTAW, GTAW process, refractory metal, refractory alloys

Abstract

The influence of the welding thermal cycle on the hardness of a dissimilar union of tantalum, grade B 521 and B 708. The parameters considered were the type of current, intensity, welding speed and voltage. arc, also including linear energy and shielding gas consumption was determined. Hardness measurements were made on the base material, the molten zone, the heat-affected zone and the interface at different distances, variables also used in the design of experiments. It was determined that, with a welding speed of 0.0048 m/s and 85 A, a quantity of heat of 58,253.68 W is introduced, with which the recrystallization phenomenon can be minimized. Due to the effect of the thermal cycle, the hardness in the heat affected zone is 124 HV for B 708 and 153 HV for B 521, at the interface it is 125 and 147 HV respectively, but with a drop to 95 HV in the molten zone, where the presence of nitrogen and oxygen are likely to influence this property.

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Published

2024-03-01

How to Cite

Pérez-Lamorú, M. de L., Ardebol-Matos, T., Lamorú-Urgellés, M., Columbié-Fermin, Y., & Gómez-Fernández, M. (2024). Influence of the welding thermal cycle on the hardness of a dissimilar tantalum joint. Science & Future, 14(1), 56–71. Retrieved from https://revista.ismm.edu.cu/index.php/revistacyf/article/view/2485

Issue

Section

Ciencia Universitaria

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